Omron VARISPEED F7

7-11
7
OL3
Overtorque Det 1
(flashing)
Overtorque Detection 1
The Inverter’s output current (V/f
control) or the output torque (Vec-
tor control) exceeded L6-02 for
longer than the time set in
L6-03 and L6-01 = 1 or 2
Motor was overloaded
Ensure the values in L6-02
and L6-03 are appropriate.
Check application/machine
status to eliminate fault.
OL4
Overtorque Det 1
(flashing)
Overtorque Detection 1
The Inverter’s output current (V/f
control) or the output torque (Vec-
tor control) exceeded L6-02 for
longer then the time set in
L6-03 and L6-01 = 1 or 2
Motor was overloaded
Ensure the values in L6-05
and L6-06 are appropriate.
Check application/machine
status to eliminate fault.
UL3
Undertorque Det 1
(flashing)
Undertorque Detection 1
The Inverter’s output current (V/f
control) or the output torque (Vec-
tor control) fell below L6-02 for
longer then the time set in L6-03
and L6-01 = 5 or 6.
Motor was underloaded
Ensure the values in L6-02
and L6-03 are appropriate.
Check application/machine
status to eliminate fault.
UL4
Undertorque Det 2
(flashing)
Undertorque Detection 2
The Inverter’s output current (V/f
control) or the output torque (Vec-
tor control) fell below L6-05 for
longer then the time set in L6-06
and L6-04 = 5 or 6.
Motor was underloaded
Ensure the values in L6-05
and L6-06 are appropriate.
Check application/machine
status to eliminate fault.
OS
Overspeed Det
(flashing)
Overspeed Alarm
Detected when A1-02 = 1 or 3
and F1-03 = 3.
The motor speed feedback
(U1-05) exceeded the value set in
F1-08 for a time longer than the
setting in F1-09.
Overshooting/undershooting are
occurring.
Adjust the ASR settings in the
C5 parameter group.
The reference was too high.
Check the reference circuit
and reference gain.
The settings in F1-08 and F1-09
are not appropriate.
Check the settings in F1-08
and F1-09
PGO
PG Open
(flashing)
PG Disconnection
Detected when F1-02 = 3 and A1-
02 = 1 or 3.
Detected when no PG (encoder)
pulses are received for a time
longer than the setting in F1-14
There is break in the PG wiring.
Fix the broken/disconnected
wiring.
The PG is wired incorrectly. Fix the wiring
Power isn't being supplied to the
PG.
Supply power to the PG prop-
erly.
DEV
Speed Deviation
(flashing)
Excessive Speed Deviation
Detected when F1-04 = 3 and
A1-02 = 1 or 3.
The speed deviation is greater
than the setting in F1-10 for
longer than the setting in F1-11.
The load is too large. Reduce the load.
The acceleration time and decel-
eration time are too short.
Lengthen the acceleration time
and deceleration time.
The load is locked. Check the mechanical system.
The settings in F1-10 and F1-11
are not appropriate.
Check the settings in F1-10
and F1-11.
EF0
Opt External Flt
(flashing)
Communication Option Card
External Fault
An external fault condition was
present, input from a communica-
tion option card.
Check for an external fault
condition.
Verify the parameters.
Verify communication signals
Table 7.2 Alarm Detection
Display Meaning Probable causes Corrective Actions